Apparatus for producing gaseous ozonides



May 8, 1928. 1,668,884

E. J. BAGNALL APPARATUS FOR PRODUGING GASEOUS OZONIDEIS Original FiledApril 1'?. 1918 5 Sheets-Sheet l "IW jf- May 8, 1928. 1,668,884

E. J. BAGNALL,

APPARATUS-FOR PRODUCING GASEOUS OZONIDES v 5 Sheets-Sheet 9 May 8, 1928.

E. J. BAGNALL.

APPARATUS FOR PRODUCING GASEOUS OZONIDES Original Filed April 1'7, 19185 Sheets-Sheet 5 May 8, 1928.

1,668,884 E. J. BAGNALL APPARATUS FOR PRODCING GASEOUS OZONIDES OriginalFiled April 17, 1918 5 Sheets-Sheet 4 May 8, 1928.

1,668,884 E. J. BAGNALL l APPARATUS FOR PRODUCING GSEOUS OZONIDEIS 7 l 5www@ A:

original Filed April 1'?. 19.18

WmmaMsexx-.m

Patented May 8, 1928.

UNITED STATES PATENT OFFICE.

ERNEST J'. BAGNALL, 0F CLEVELAND, OHIO; ANNA M. BAGNALL, 'EXECUTRIX 0FSAID ERNEST J'. BAGNALL, DECEASED, ASSIGNOR T0 KNOX TERPEZONE COMPANY,INC., A CORPORATION OF NEW' JERSEY, AND KNOX TEBPEZONE COMPANY 0FAMERICA, INC., A CORPORATION OF WEST VIRGINIA.

APPARATUS FORl PRODUCING GASEOUS OZONIDES.

continuation ot application aerial No. 229,018, led April 17, 1918. Thisapplication ied November 28,

1922, Serial No. 602,752. Renewed `Tuly 30, 1927.

This invention relates to a paratus for producing gaseous ozonides an 1sgenerally an improvement upon the apparatus shown, described and claimedin the patent to Wil- 5. liam John Knox No.` 1,088,346 issued February24, 19,14, the general purpose and object of this invention being toproduce an apparatus which, while of the general type disclosed'in saidpatent, is adapted to perm form its 'functions with a maximum eiiiciencyand without requirin the attendance of a skilled operator, there yenabling the apparatus to be installed in the home or apartment of thepatient and to operate conu tmuously and umnterruptedly withoutsurvison. Further and more limited ob- ]ects of the` invention willappear hereinafter in the specification and will be pointed outandembodied in the claims hereto anl0 nexed.

ratus;

ozonizer corresponding respectively to the .lines 8-8 and 9-9 of Fig. 5;Fig. 10 is a vertical sectional view through the evaporating tank andits associated parts; Fig. 11 a horizontal sectional view correspondingsubstantially to the line 11-11 of Fig. 10, the supply tank or bottlebeing omitted; Fig. 12 a horizontal sectional view correspondlngsubstantially to the line 12-12 of Fig. 10; Fig. 13 a detail in sectionand Fig. 14 a detail in plan of the controllin switch and its associatedparts; Fig. 15 1s a sectional plan view corresponding to the line 15-16of Fig. 13; Fig. 16 a similar view looking upwardly; Fig. 17 'is adiagrammatic view showing the electrical connections for supplyin` airto the'a paratus and for operatlng t e ozonizing evice thereof; Fig. 18a perspective view of the pinene tank and the chamber, the cover of thelatter being raised and certain parts being broken away; and Fig. 19 aperspective view of the cabinet or caslng and the parts cooperatingtherewith.

In the embodiment of the invention disclosed herein, the apparatuscomprises generally a fan with a flexible tubular connection for air; amotor driving said fan; a drying tube through which all the air suppliedto the ozone generatorand to the evaporating tank is conducted; an evarating tank through which part of the air rom the dryingtube isconducted; an ozone genera.- tor through which the other art of the airfrom the drying tube is condhcted; a mixing or commingling .chamberwherein the vapor laden air from the tank and the ozone from thegenerator are mingled to roduoe pinene ozonide; a distributing globe 0rsuch pinene ozonide; a conduit Afor conducting air in excess of thatrequired for the production of pinene ozonide to the ozone generator andto the motor thereby to cool the same; an electric time switch capableof adjustment whereby the apparatus may be run continuously, or forpredetermined time intervals, as occasion may require; and a cabinet forthe foregoing parts.

Describing by reference characters the various parts illustrated herein,ldenotes a fiexible tube the inlet end whereof may be inserted in anopening ina window board or other suitable source of fresh air supplyand the delivery end whereof is provided with a coupling 2 which may bethreaded onto a corresponding connection 3 projecting through one sideof the cabinet 4 from the central inlet of a centrifugal fan 5 the shaft6 whereof is driven by a motor 7. This motor is an induction motorspecially wound t0 l,

produce a constant speed under variable load and potential. vThe outlet8 from the fan casing discharges into a connection 9 oommunicating witha chamber 10 beneath the drying tube, said connection and chamber' beingconveniently formed by a casting of the shape shown in Figs. 4 and 6.'The connection 9 is provided with a partition 11 having apertures 12therethrough, the volume of air supplied through these apertures to thedrying tube being controlled by a disk valve 13 secured to a -stem 14extending also provided with a cylindrical wall 21 eX- tending throughthe wall 18 and provided with an internal thread enabling it to supporta Mason jar, or similar receptacle 22,

having an externally threaded upper end.-

The top of the chamber 10.supports the bottom casting 23 of the dryingtube. This casting is provided with an upwardly convex or dome shapedwall 24 for the drying agent, said wall having openings 25 therethroughwith rounded projections26 on the solid portions thereof between saidopenings. The casting 23 is provided, outside said wall, with acylindrical flange 27 which receives therewithin the bottom of the tube28, said tube being preferably of glass and having its upper end ,seatedwithin the cylindrical flange 29 of the cover, conveniently formed as acasting and having a filling projection 30 at its to provided with ascrew cap 31. The cover 1s provided with passageways 32, 33 from whichthe-dried air is conducted, through pipes 34 and 35 threaded thereintorespectively, to the evaporating tank and the ozonizer. I

The drying agent which is preferably u sed in the drying tube will becalcium -chloride, and the construction of the dome shaped bottom 24 ofthe drying chamber has proven to be of marked advantage in that theopenings 25 for, the water extracted from the air will never clog,rendering the device absolutely reliable. The Water thus eX- tractedfrom the air is discharged through the opening 2O into the jar 22, whichmay be conveniently removed and emptied from time to time.

From the drying tube 28, air flowing through the connection 35 isconducted, through a connection 36, the glass tube 37, and theconnection 38 below the wall 18 to the bottom of the ozone generator orozonlzer, the'connection 38 being threaded into a cylindrical casting 39having a bottom plate 39 supported upon the wall 18 and a cylindricalange 39" centering the bottom of acylindrical supporting member 40beneath the ozomzer receptacle. This supporting v member 40 ispreferably of wood and is provided with a plurality of passageways 41extending therethrough, said member being concaved whereby 'it forms aseat corresponding to the convexed bottom 42a of the inner ozonizingreceptacle 42 and supports the same against lateral movement. At itsupper end the supporting member is provided with an annular seat 40aformed within and at the bottom of a centering wall 4Q". Within thiswall and resting on said seat 1s the outer ozonizing receptacle. Theinner ozonizing receptacle is a glass tube 42 closed orseated at itsbottom 4and rounded, as shown, and fitting within the concave seatprovided therefor in the member 40; at its upper end it is also roundedand provided with a tubular neck 43.' The interior surface of thisreceptacle is roughened, as by etching with hydroiuoric acid.

44 denotes the outer cylindrical wall of a double-walled glassreceptacle surrounding the receptacle 42. This outer wall iscylindricaland is joined at its bottom with an inner wall 45, the wallsproviding therebetween an annular receptacle which is seated within thetop of the member 40 in the manner described hereinbefore. The upper endof the wall 45 is rounded complementarily to the rounded upper end ofthe receptacle 42, andis provided with a neck 46 having therewithin astopper 47, which vmay be of cork or any other suitable material, 'andthrough which the tubulure 43 of the tube 42'extends,^this arrangementserving to po'- sition accurately and concentrically the upper partofthe receptacle 42 and of the wall 45, thereby to maintain at constantwidth the air gap therebetween. The manner of supporting the lower andthe upper ends of the ozonizing receptacles secures and mam- Itains thisuniform width of air gap, with a resultant uniform maximum eiciency inthe ozonizing of the air passing through sald gap. From onev side of theupper end of the wall 45 there projects an outlet connection 48. 4 Thereceptacle 42 is substantially filled with' suitable electrolyte, suchas a solution of calcium chloride in distilled water, while the annularreceptacle formed between the walls 44 and 45 is also filled with suchelectrolyte'. 49 and 50 denote the electrodes extending respectivelyinto the electrolyte within the receptacle 42 and that within theannular receptacle provided between the walls 44 and 45. Each of theseelectrodes is preferably a lead wire encased in a glass tube, each wireterminating short of the lower end of its tube, whereby the glass wallof the surrounding tube w1ll act as a non-conducting shield and preventa- IDI lar chamber l51 formed between the inner 'l and outer'receptacles. .This arrangement i t i Lacasse v 3 secures an extremelyimportant advantage over the arrangement shown in the Knox patentreferred to. The action of the ozone generator necessarily produces someheat. With the parts arranged as shown, this heat assists in thecirculation of thel air through the generator, due to the naturaltendency of heated air to rise; in the construction shown in the patent,this natural tendency of the heated air to rise opposes suchcirculation. Where this circulation is opposed by the heat evolved inthe operation of the generator, pinene vapor is liable to be lsucked ring these tubes (whichare usually made of glass onesixteenth inch thick)has resulted in breaking some sixty per cent of the tubes. A furtherdisadvantage in the prior apparatus arose from the fact that theozonizer would at times become excessively'heated, gasifying orvaporizing the electrol te and blowing the lsame out of the annu archamber formed between the walls 44 and 45. This resulted, not only in awaste of the electrolyte and a lowering of eiciency in the ozonizer, butin the frequent breaking of the glass receptacles and the necessity forfrequent inspection and interruption of operation. By reversing the Howof air to be ozonized, passing it through the ozonizer upwardly, thenatural tendency of heated air to rise is taken advantage of, theproportions of pinene and ozone in the mixing chamber remain constant,there is no vaporization or gasification of the electrolyte, no breakageof the glass receptacles, and no contamination of the ozone by pinonicacid, because of the isolation of the ozonizer, as to reversecirculation, from the mixing chamber. Furthermore, this reversal,coupled with the maintenance of auniform air gap at 51, results in auniform supply of ozone 4to the mixing chamber.

From theannular chamber 51, the ozone 0r ozonized air is conducted,through the outlet connection 48, connection 52, tube 53,

and connection 54 to the top of the mixing chamber, which will bereferred to hereinafter.

The air passing from the drying tube to the connection 34 is conductedto the evapo rating tank through an 'elbow 55 having a valve 56 thereinbywhich the proportions of air delivered respectively to the ozoniz'erand tothe evaporating tank may be controlled and varied. From this elbowthe air is conducted through the pipe connections 57 and 58 into theevaporating tank, which will now be described. This tank is shown lasapproximately rectangular in shape, one

corner being cut away, as indicated at 59, forA a purpose to be-described hereinafter. Projecting downwardly from the cover 60 arebellies 61, said balesfbeing arranged so as to provide a long andtortuous passageway for air above thepinene in said tank, the flow ofair through the tank being indicated by the arrows on Fig. 12. These bafHes extend to about one-sixteenth inch from the bottom of the tank,which will obviously allow the level of the pinene in thetank to fall-to aboutone-sixteenth inch from 'the bottom of the tank before any aircan-leave the tank except along the` tortuous ath de scribed therefor.The cover is a rovided with a sealing tube 63 having a aring support forthe shoulder of a pinene container bottle 62, the tube 63 extending towithin about one-sixteenth of an inch of the bottom of the tank, theupper flaring end 64 of said tube cooperating with the shoulder of therbottle to support the same. The parts are so proportioned that thebottle will be supported with its mouth 62* about Imidway between thecover 60 and 'the bottom of the tank. It will be evident that, with thisarrangement, as long as there is any pinene inthe bottle 62, -an air gapof constant width, about half the depth o the tank, will be providedabove the pinene in the tank. This secures absolute uni.

formity in the proportion of pinene conveyed to the mlxing chamber. Theglass bottle serves as an eli'ective indicator whereby the user oroperator may be informed as to the necessity for a new supply of pinenefor the tank. Furthermore, should the operator neglect to replace thebottle 62, when empty, with a full one, or to refill said bottle,thepinene level within the tank may fall-to within onesixteenth in ch ofthe bottom without permitting the air to circulate therethrough exceptin operative re lation to the pinene throughout the entireV lengt-h ofthe tortuous passageway. Furthermore, should the level fall below theconstant level which it is desired to maintain, the period wherein thisvariation from normal condition continues will be' so short that noserious detriment will result.

The pinene-laden air flows from-the evaporating tank into the mixingchamber 65, said chamber being provided between a cover 66 and a bottomcomprising two sections 67 inclined upwardly from opposite sides of adiagonal line 67* and both sections being inclined toward a commonoutlet. The' cover is provided with depending l or ozonized air and thepinene laden air,

with a tortuous passageway through which this mixture passes to theoutlet connection whereby the molecules are thoroughly in-v termingled.and the chemical combination ensuesv resulting in the production ofpinene ozonide, said tortuous passageway being provided b baiilesdepending from the cover, and un er and above which in alternation themixture flows in its passageway to the outlet. These baflles arepreferably provided within a quadrilateral chamber formed by wallsdepending from the cover, one of which 68 terminates-short of theinclined bottom, providing a passageway for the the inside of thechamber.

Ato the outlet connection -72 projecting from mixture from lthe outsideof such wall to The balies 69 substantially contact with the inclinedbottom 67, but 'are spaced from the cover, providing each ai passagewaytherebeneath, there being a `final baffle 71 extending upwardly from'the inclined bottom toward the cover and 'above which the mixturepasses the cover.

As some pinonic acid is formed where the ozone and the pinene laden airfirst meet in the mixingschamber, means are provided vfor removing thispinonic acid to prevent it from contaminating the pinene. This means isafforded by 'the inclined bottom having at the lower end thereof adischarge outlet 73, said discharge outlet extending through 'saidbottom, through thecover-74 (preferdisk 78, -of any suitable material.

After having been freed from pinonic acid, the pinene ozonide isdischarged through the cover connection 79, glass tube 80, andVconnection 81 into the tubular neck 82 of the distributing globe 83. iThe lower end of the tube is sealed into the upper end of the connection81, the same being referably a casting comprising a horizonta .flangedhead 8l having a reduced threaded extension 81 therebeneath and adepending tube 81, the tubular portion being inserted into the up perend of the lass tube 80. The u per end of the glass tu bears against thepacking washer 84 within an internally threaded sleeve 85, the ringbeing supported by an inturned flange 86 lwhich closely surrounds theupper end of the tube 80, the packing being preed against the top\of thetube by a locking ring threaded into said sleeve. The globe with itsattached connection is fitted in place by threading the part 81" intothe top of the sleeve 85.

Reference has been made hereinbefore to the electrical connections'whereby the apparatus may be operated continuously or intermittently forany desired time interval. These connections are shown in detail inFigs. 13 to 16 inclusive and in diagram in Fig. 17. It will be observedthat the upper end of the sleeve 85 projects through the top 87 of thecabinet. This sleeve is conveniently formed as a casting having anarcuate flange 88 thereon provided with a scale having `indicationsthereon of the oli and on positions of the switch and the time intervalsat which the apparatus is to operate intermittently. In the embodimentof the invention disclosed herein, these time intervals are multiples offifteen minutes, the parts being so arranged that when the switch ismoved' to bring its indicator to the point 1 5, the apparatus willoperate for fifteen yminutes, whereupon it will be cut oi automaticallyfor the remaining forty ve minutes of the hour. When set at 30, theapparatus will loperate'for thirty minutes and will be cnt oi for theremaining thirty minutes. When set at 45, the apparatus will operate forforty-tive minutes -and be cut off for the remaining fifteen minutes;when set to the` on position, the apparatus will operate continuouslyuntil the switch is moved to the o position or any intermediateposition. The sleeve 81 is conveniently secured to the'top of thecabinet by means of screws 89 extending through radial ears .90 bearingon the top of the cabinet.

91 denotes an arcuate switch plate arranged outside of the sleeve 85 andconcentric therewith andpreferably located immediately below -ythe to 87of the cabinet. This late is fastene to a similar arcuate fiber lock 92,as by means of screws 93, the block in turn being fastenedto an arcuateflange 94 depending from an annular plate 95 which surrounds the sleeve81,

eneath the flange 88 and within the ears 90. This annular plate isprovided with an upwardly extending arm 96, provided with an operatinghandle 97, said arm having an indicator portion 98 cooperating with thescale or index on the plate or fia-nge 88.

The switch plate 91 cooperates with'an arcuate series of contacts,indicated generally at 99 (Fig. 15) and each comprising a sleeve 100threaded into the "supporting plate 101 carried by the top of thecabinet, each of the sleeves 100 having a helical spring 102 thereinadapted to thrust a ball 103 upwardly into contact with the switch plate91. Five such-contacts areshown, and the three intermediate contacts areeach eleollO trically connected by conductors 104 with three of the foursegmental contacts 105 (see Figs. 2 and 17) grouped about an arbor 106driven at a constant speed, as by means of clock Work mechanism, andcarrying the wiping contact plate 107, said arbor being in thecircuitincluding the contacts 99 and the 4an hour and then oi for segmentalcontacts 105.

The electrical connections whereby the apparatus is operated are showndia rammatically in Fig. 17 wherein 108 an 109 represent the wiresleadingv from the usual source ofsupply, such as an electric lampsocket. The wire 108 is connected at one side of the motor 7 and thewire 109 at the opposite side, whereb the motor may be operated in theusua manner to vdrive the fan. The wire 108 is also connected with'theprimary winding 110 of a high frequency transformer, the secondarywinding'lll whereof is in circuit with the ozone generator, whereby thecurrent used for such generator will be a current of short wave lengthhaving a pressure of approximately 9,000 volts, ren dering it mosteicient for the ozonization of the an'. One branch 112 of the wire 108leads to the contact 99 at one end of the segmental series and from saidcontact to the central contact member (the arbor 106) of thetime-control contacts while a branch 113 of the wire 109 leads to theContact at the opposite end of the series 99. The other three contactsof this series, tts-previously pointed out, are connected to three ofthe four segmental contacts 105. With this ary rangement, and assumingthat the arbor 106 `makes one revolution per hour and that the switchplate is in the position shown in Fig. 17, the circuit throu h thecontacts 105 and arbor 106 will be c osed for three-quarters of anhouruntil the switch blade 107 reaches the se mental contact which hasno connection wit a contact99, with the result that the apparatus willoperate for forty-five minutes and will remain inoperative for fifteenminutes. In this position the-indicator 98 will be opposite the mark 45.By mov- ,inglthe plate 91 Aalstep to the right, the plate W1 pass 0E thecontact next tothe vleft hand end, thus leaving only two-of the segments105 alive; with this arrangement the current will be on the a paratusfor half half an hour. In

like manner, by movin the indicator another step to the rightz ut one ofthel segments 105 will be a l1ve se ment and the apparatus will operatefor fteen minutes o y with a rest period of forty-five minutes, theindicator being in the meantime the point 15 on the scale. When theplate 91 1s moved so that its left hand end eng11 es the left handcontact 99, the time contro igng devices are short-circuited through theplateand v the apparatus works continuously. When the plate is moved thefull distance to th'e right, the electrical connections areV brokenentirely and the apparatus is inoperative, the full on and full offconditions being indicated by the position of the indicator 98 withreference to the index or Reference has been made hereinbefore to thefact that-the electrolyte does not become overheated in this apparatus.This result is due in part to the natural circulation provided by theair'to be ozonized. This, however, is not the only reliance against suchoverheating. The fan 6 is of such capacity and driven at such speed thatthe air brought into the apparatus thereby is far in excess of thatrequired for the roduction of pinene ozonide. The amount o air that isrequired for the roduction of such pinene ozonide is contro ed by thevalve 13. The excess air does not enter the drying tube, but

.is driven in part through a pipe 114, the delivery end whereofis'opposite the central portionof the ozonizing tubes-see Figs. 2 and 3.This surplus air maintains the ozone generator at a 4temperature whichwill enable it to function most eiectually and at and bottom thereof andat the rear of said,

artition. The casing is provided with ront and-rear doors 119,-120. In oeration, these doors should be closed, an the air which is supplied bythe fan to the inros terior of the casmg, in addition to cooling themotor and the ozone generator, will circulatewithin the casing and beVdischarged through the appropriate sets `of openings. This circulationof air prevents the entrance of dust and of pinene ozonide into thecasing, thereby protecting the parts ofv the motor and the apparatuswithin the casing from injurious e ects due to the access thereto of thedust and pinene ozonide, or 'other injurious material. A further andvaluable feature of the invention resides in the vfact that the fan isso proportionedv and driven that the air supplied through the exibleinlet tube 1 moves at a velocity of about five hundred feet per minute.'This renders the ap aratuspractically immune from outside windconditions, and especially where in addition to such veloelity, thecontrolling valve 13 is interose p Reference has been made hereinbeforeto the casing o r cabinet in which the operating parts of the apparatusare enclose This cabinet is madeof a multiplicity of plies of veneer,whereby liability of warping is precluded.

This application is a continuation of my application, Serial No.229,018, filed April 17, 1918. l

`Havin thus described my invention, what I c aim is:

1. In anapparatus for producing gaseous ozonides, the combination, withan ozone generator, an evaporator, anda mixing chamber, of a driercommunicating with said generator and evaporator, means for supplyingair to said drier, and means for directing additional air in coolingrelation to said generator.

2. In an apparatus for producing gaseous ozonides, thecombination, withan ozone generator, an evaporator, and a mixing chamber, of a motor, anair moving device driven by said motor, a drier communicat-v ing withsaid device and with said generator and said evaporator, and means fordirecting air from saiddevice in cooling relation to said generator andsaid motor.

3. In an apparatus for producing gaseous ozonides, the combination, withan ozone generator, an evaporator, and a mixing chamber, of a motor, an'air moving device driven by said motor, a drier communicatf ing withsaid device and with saidugenerator and said evaporator, a casingenclosing the aforesaid enerator and motor, and means for circu atingair from said device throu h said casing and in .cooling relation to saigenerator and motor.

4; The combination, with an ozone generator com rising an air su ply andan annular cham er through whiclh air to be ozonized is conducted, ofmeans for maintaining uniform the width of such annular chamber, aliquid-containing tank, an air supply to said tank, means formaintaining constant the width of the passagewa I'or air through saidtank and above the iquid therein, and a mixing chamber to which thevapor-charged air and the ozone from the generator are. conducted.

5. In an apparatus of the character described, the combination of anozone generator, means for supplyin air thereto, an evaporator, meansfor supp ying air thereto,

' a mixing chamber, connections for supplying thereto ozone from the'generator and saturated `air from the evaporator, and means formaintaining constant the proportions of ozone and saturated air suppliedto the mixing chamber.

6. In an apparatus of the character described the combination of anozone generatorl having a passageway for air to be ozonized, anevaporatingtank having a passageway for air to be saturated by exposureto liquid therein, a mixing chamber connected to said passageways,means. for supplying1 air to said passageways, and means for ma'ntainingsubstantially constant the cross-sectional area of each of saidpassageways. .Y

7. An ozone generator having in combination a vertical passagewaytherethrough for air to be ozonized and a mixing chamber, connectionsbetween the upper end of said assageway and the mixing chamber, means orsupplyin air to the bottom o said passageway, an means for directing acurrent of air in operative relation to said generator thereby to cool.the same.

8. An ozone generator comprising in com bination a drying device andapair of concentrically arranged tubes providing a ver- .tical annularpassa eway for air therebetween, connections4 or supplying air from thedrying device to the bottom of said pas-' sageway, and means forsupporting said tubes in concentric relation whereby a constant width ofannular passageway 'therebetween will be preserved.

9. An ozone generator comprising in combination a pair ofconcentricallyarranged receptacles providing a vertical annularpassageway therebetween for air to be ozonized means for supplying airtothe lower end o said passageway, and a conduit extending from the upperend of said passageway.

10. In an apparatus of the character described,'the combination with anozone generator and a saturating tank, of a motor a fan driven thereby,connections for.A su plying a part of the air delivered by sai fan tosaid generator and to said tank, means for controlling the volume andvelocity of the air so vsupplied to the generator and tank, and abypassconnection f or excess air leading in operative relation to thegenerator.

11. In an ap aratus of the character described, the com ination, with anozone generator and a saturating tank, of a motor, a. fan driventhereby, connections for supplying a part of the air delivered by saidfanv to said generator and to said tank, means for controlling thevolume and velocity of the air so supplied to the generator and tank,and a bypass connection for 'excess'air leading in operative relationto' said motor.

12. In an apparatus of the character del accesos 7 above the surface ofthe liquid therein and Y for conducting the air thus saturated to saidmixing chamber.

13. The combination, with an evaporating tank provided with a coverhaving a series of baiiies providing a continuous extended passagewayfor the circulation of air above the liquid contained in said tank atone end of said passageway, of a tube projecting downwardly into saidtank, and a receptaclev supported mouth'downward in position todischarge into said tube, the said tube servin to maintain the liquid insaid tank at a uniform distance below the said cover.

14. In an apparatus of the character described, the combination, with amixing chamber, and means for supplying ozone thereto, of' `anevaporating tank having a cover and means for maintaining the liquidtherein at a uniform distance belowl said cover and means providing atortuous passageway for air above -such liquid and below said cover,connections for supplying air to one end of such passageway, andconnections leading from the other end of such passageway to the mixingchamber.

15. In apparatus of the character described, the combination, with a'mixing chamber and means ,for supplying ozone thereto, of an evaporatmgtank having ay cover, means for maintaining substantially constant thedistance of the liquid in said tank from said cover, means for supplyingair to said tank `above the level of the liquid maintained therein, andmeans for conducting the vapor-laden air from the tank to the mixingchamber.

16. The combination, with a mixing chamber and means for su plying ozonethereto, of an evaporator tan having a cover provided with a series ofdownwardly directed bales extending approximately to the bot2 -tom ofsaid tank and forming a continuous tortuous passageway, there being aconnection for supplying air to one end of said passageway and forconduct-ing vapor-laden air from the other end of said assageway, andmeans for supplying liqui to said tank, said means comprising a tubecarried by the cove!` and extending to substantially the bottom of thetank, and a receptacle supported with its mouth directed downwardly msaid tube, whereby the level of liquid in said tank will normally bemaintained at a constant distance below said cover and the circulationof air through the tank above -the liquid therein may proceedwithoutadmission of extraneous air until substantially the entire liquidcontents of the tank have been evaporate 17. In an apparatus of thecharacter described, the combination, with an air drying device, of anozone generator comprising a pair of concentrically spaced receptaclesroviding therebetween a vertically exten annular passageway, a conduitfor air extendin rom the rying device to the bottom o said passageway,there being'` an outlet connection extending from the top of suchpassageway, and means supporting said receptacles and maintaining thesaine in concentric relation whereby the width of the annular passagewayprovided therebetween will remain constant.

18. In an apparatusof the character described, the combination, with anair drying device, of an ozone generator comprising a pair ofconcentrically spaced receptacles pro` viding therebetween annularpassageway, and a conduit for air extending from the drying device tothe bottom of said passageway, there being an outlet connectionextending from the top of such passageway.

i 19. In an apparatus for producing gaseous ozonides. tlie-'combnation,with a mixin chamber having an inlet and an outlet an means forsupplying a. mixture of gaseous and vaporous iiuids to s'uch inlet, of aseries of baies interposed between the inlet and the outlet, saidchamber having a down- -wardly inclined bottom and a discharge openingat the lower end of such bottom, and a receptacle larranged to collectmatter discharged through said opening.

20. In apparatus for producing gaseous ozonides, the combination of amixing chamber and means for supplying thereto gaseous and vaporousfluids, an outlet connection, a series of baffles interposed between theinlet connection and the outlet connection, an

inclined bottom below said baies, there being a discharge outlet at thelower end of such inclined bottom, a receptacle adapted to receivematerial .discharged through said opening, and means yieldingly holdingsaid receptacle inoperative relation -to said open'- in v l. In anapparatus for producing gaseous ozonides, the combination, with a mixingchamber having an outlet openin in the bottom for impurities, of a. shef, a receptacle mounted on said shelf and adapted to receive materialdischarged through said o ning, means cooperating with said shelf tereby to hold the receptacle in operative relation to said opening, andmeans for supplying gaseous f d vaporous iiuids to said chamber.

22. In an a paratus for producing gaseous ozonides, t e combination,with an evaporating tank having a cover provided with a series ofdownwardly directed baies and inlet and outlet connections for air.located at opposite ends of said seriesand providingJSl the liquid rewill be maintained at a predetermined distance below said cover, andmeans for supplying a gaseous fluid to said tank.

23.. In an apparatus for producing gase- I ous ozonides, thecombination, with an evaporating tank having a cover provided with aseries of downwardlyextending baffles and rovided at one end of saidseries with an inlet connection for air and at the other end y 10 ofsaid series with an outlet connection, said cover having a tubeproJecting downwardly therefrom, of a receptacle above the cover andadapted to discharge through said tube` said tube serving to maintainthe liquid in 1I said .tank at a constant distance below said cover.

24. An air drying device for ozonizers comprising a receptacle for adrying agent, a fluid connection leading to the bottom of 0' saidreceptacle,l and a dome. shaped wall above' said connection forsupporting the drying agent, said Wall having perforations and roundedprojections intermediate of such perforations, there being an outletfrom the upper end of said receptacle for the uid conductedtherethrough. v

25. An air drying device for ozonizers com rising a receptacle for adrying agent havmga connection at its bottom for the $0 admission of thefluid to be dried, an outlet at its top for the fluid dried by exposureto said agent, and a support for the drying agent interposed between theinlet connection and the drying chamber proper, said :s support -beingdownwardly inclined from the central portion thereof and being providedwith openings therethrough and with projections intermediate of saidopenings.

26. In an apparatus of the character derator, an air-moving device forsupplying vair to` said drier, means for controlling the 5 amount of airsu plied by the said device to said drier, an an outlet interposedbetween the said device and the said drier for air supplied by the saiddevice .in excess of that required for the generator and .evaporator. Vi

-2,7. In an apparatus of the character described, the combination, withan ozone generator, and an evaporator, of an air drier, connectionsfordelivering airfrom the said drier to said generator and said evaporator,a device for supplying air to said drier, a duct connecting the devicewith the said drier, the said duct having an outlet, and a Q controllingdevice in said duct for varying the vamount of air supplied by the saiddevice to the said drier and to the said outlet. i 28. In an apparatusof the character described, tlie combination, with anozoe generator andan evaporator, of a. drier, connections for delivering air fromsaid'drier to said generator and said evaporator, a device for supplyingair to the said drier, a duct connecting the said device with the saiddrier," the said duct being provided with a. bypass, and means in saidduct for controlling the distribution of air from the said device to thesaid drier and to the said byass. v

In testimony whereof, I hereunto ailix my u signature.

ERNEST J.' BAGNALL.

